The six-member crew of the next space shuttle mission participated in a
full launch dress rehearsal, known as the Terminal Countdown Demonstration Test
on April 1 at NASA's Kennedy Space Center in Florida. The test provided an
opportunity for the crew and ground teams to participate in various
simulated countdown activities, including equipment familiarization,
emergency training and a simulated launch countdown.

Endeavour is targeted to launch April 19 on its final scheduled flight.
During its 14-day mission, Endeavourís astronauts will deliver to the
International Space Station the Alpha Magnetic Spectrometer, a
particle physics detector designed to search for various types of unusual
matter by measuring cosmic rays. The crew also will deliver the Express Logistics Carrier 3,
a platform that carries spare parts that will sustain station operations
once the shuttles are retired later this year.